APA Edition Citation

Gamow, G. (1963). Planet called earth. "Published previously as Biography of the earth.

Chicago Edition Citation

Gamow, George. Planet Called Earth. "Published Previously as Biography of the Earth. 1963.

MLA Edition Citation

Gamow, George. Planet Called Earth. "Published Previously as Biography of the Earth. 1963.

Warning: These citations may not always be 100% accurate.